{"id":102492,"date":"2021-12-06T15:36:44","date_gmt":"2021-12-06T13:36:44","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-gipervizorov-xen-4-16-i-intel-cloud-hypervisor-20-0"},"modified":"2021-12-06T15:36:44","modified_gmt":"2021-12-06T13:36:44","slug":"vypusk-gipervizorov-xen-4-16-i-intel-cloud-hypervisor-20-0","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/news\/vypusk-gipervizorov-xen-4-16-i-intel-cloud-hypervisor-20-0","title":{"rendered":"Lansarea hypervisorilor Xen 4.16 \u0219i Intel Cloud Hypervisor 20.0.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Dup\u0103 opt luni de dezvoltare, a fost lansat\u0103 versiunea liber\u0103 a hipervizorului Xen 4.16. La dezvoltarea acestei versii au participat companii precum Amazon, Arm, Bitdefender, Citrix \u0219i EPAM Systems. Actualiz\u0103rile pentru ramura Xen 4.16 vor continua p\u00e2n\u0103 pe 2 iunie 2023, iar publicarea corec\u021biilor de vulnerabilitate va dura p\u00e2n\u0103 pe 2 decembrie 2024.      <\/p>\n<p>Schimb\u0103ri majore \u00een Xen 4.16:   <\/p>\n<ul>\n<li class=\"l\"> \u00cen TPM Manager, care asigur\u0103 func\u021bionarea chip-urilor virtuale pentru stocarea cheilor criptografice (vTPM), implementate pe baza unui TPM fizic comun (Trusted Platform Module), au fost f\u0103cute corec\u021bii pentru implementarea ulterioar\u0103 a suportului specifica\u021biei TPM 2.0.\n<li class=\"l\"> A crescut dependen\u021ba de stratul PV Shim, utilizat pentru a rula sistemele de operare guest paravirtualizate nemodificate (PV) \u00een medii PVH \u0219i HVM. \u00cen continuare, utilizarea sistemelor de operare guest paravirtualizate de 32 de bi\u021bi va fi posibil\u0103 doar \u00een modul PV Shim, ceea ce va reduce num\u0103rul de locuri din hipervizor unde pot ap\u0103rea poten\u021biale vulnerabilit\u0103\u021bi.\n<li class=\"l\"> A fost ad\u0103ugat\u0103 capacitatea de boot pe dispozitive Intel f\u0103r\u0103 timer programabil (PIT, Programmable Interval Timer).\n<li class=\"l\"> A fost efectuat\u0103 cur\u0103\u021barea componentelor dep\u0103\u0219ite, iar compilarea implicit\u0103 a codului &#171;qemu-xen-traditional&#187; \u0219i PV-Grub a fost oprit\u0103 (necesitatea acestor fork-uri specifice Xen a disp\u0103rut dup\u0103 integrarea modific\u0103rilor cu suport pentru Xen \u00een baza principal\u0103 a QEMU \u0219i Grub).\n<li class=\"l\"> Pentru sistemele guest cu arhitectur\u0103 ARM a fost implementat un suport ini\u021bial pentru contoare virtualizate pentru monitorizarea performan\u021bei (Performance Monitor Counters).\n<li class=\"l\"> Suportul pentru modul dom0less a fost \u00eembun\u0103t\u0103\u021bit, permi\u021b\u00e2nd evitarea desf\u0103\u0219ur\u0103rii unui mediu dom0 la pornire <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/ro\/vps\/\"   title=\"ma\u0219ini virtuale\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2079\">ma\u0219ini virtuale<\/a> \u00een timpul fazei timpurii de boot a serverului. Modific\u0103rile f\u0103cute au permis implementarea suportului pentru sisteme ARM pe 64 de bi\u021bi cu firmware EFI.\n<li class=\"l\"> Suportul pentru sistemele heterogene ARM pe 64 de bi\u021bi bazate pe arhitectura big.LITTLE a fost \u00eembun\u0103t\u0103\u021bit, combin\u00e2nd \u00een acela\u0219i chip nucleele puternice, dar consumatoare de energie, cu nucleele mai pu\u021bin performante, dar mai eficiente energetic.    <\/ul>\n<p>\u00cen acela\u0219i timp, compania Intel a publicat versiunea 20.0 a hypervisorului Cloud Hypervisor, construit pe baza componentelor unui proiect comun Rust-VMM, la care particip\u0103, pe l\u00e2ng\u0103 Intel, \u0219i companiile Alibaba, Amazon, Google \u0219i Red Hat. Rust-VMM este scris \u00een limbajul Rust \u0219i permite crearea de hypervisori specifici pentru anumite sarcini. Cloud Hypervisor este unul dintre ace\u0219ti hypervisori, care ofer\u0103 un monitor de ma\u0219ini virtuale (VMM) de \u00eenalt nivel, func\u021bion\u00e2nd pe deasupra KVM \u0219i optimizat pentru a rezolva sarcini caracteristice sistemelor cloud. Codul proiectului este disponibil sub licen\u021ba Apache 2.0.    <\/p>\n<p>Cloud Hypervisor se concentreaz\u0103 pe rularea distribu\u021biilor moderne de Linux utiliz\u00e2nd dispozitive paravirtualizate bazate pe virtio. Printre sarcinile cheie se num\u0103r\u0103: reac\u021bie rapid\u0103, consum sc\u0103zut de memorie, performan\u021b\u0103 ridicat\u0103, simplificarea configur\u0103rii \u0219i reducerea vectorilor posibili pentru atacuri. Suportul pentru emulare este redus la minimum, iar accentul este pus pe paravirtualizare. \u00cen prezent, sunt acceptate doar sistemele x86_64, dar este \u00een plan \u0219i suportul pentru AArch64. Din sistemele gazd\u0103, momentan sunt acceptate doar versiunile de 64 de bi\u021bi ale Linux. Configurarea CPU, memoriei, PCI \u0219i NVDIMM se face \u00een timpul construirii. Este prev\u0103zut\u0103 posibilitatea migra\u021biei ma\u0219inilor virtuale \u00eentre. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/ro\/server\/dts-dusseldorf\/\"   title=\"servers\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3446\">servers<\/a>.       <\/p>\n<p>\u00cen noua versiune:  <\/p>\n<ul>\n<li class=\"l\">  Pentru arhitecturile x86_64 \u0219i aarch64, acum se permite crearea a p\u00e2n\u0103 la 16 segmente PCI, ceea ce cre\u0219te num\u0103rul total de dispozitive PCI permise de la 31 la 496.\n<li class=\"l\"> A fost implementat suportul pentru legarea virtual CPU la nuclee fizice CPU (CPU pinning). Pentru fiecare vCPU acum se poate defini un set limitat de CPU gazd\u0103 pe care se permite execu\u021bia, ceea ce poate fi util pentru reflec\u021bia direct\u0103 (1:1) a resurselor gazdelor \u0219i sistemului gazd\u0103 sau pentru rularea unei ma\u0219ini virtuale pe un anumit nod NUMA.\n<li class=\"l\"> Suportul pentru virtualizarea intr\u0103rii\/ie\u0219irii a fost \u00eembun\u0103t\u0103\u021bit. Fiecare regiune VFIO poate acum fi reflectat\u0103 \u00een memorie, ceea ce reduce num\u0103rul de opera\u021biuni de ie\u0219ire din ma\u0219ina virtual\u0103 \u0219i permite ob\u021binerea unei performan\u021be mai bune \u00een direc\u021bia dispozitivelor \u00een ma\u0219ina virtual\u0103.\n<li class=\"l\"> \u00cen codul scris \u00een limbajul Rust, a fost realizat\u0103 o munc\u0103 de \u00eenlocuire a sec\u021biunilor unsafe cu implement\u0103ri alternative care sunt executate \u00een mod safe. Pentru sec\u021biunile unsafe r\u0103mase, au fost ad\u0103ugate comentarii detaliate care explic\u0103 de ce codul unsafe l\u0103sat poate fi considerat sigur.  <\/ul>\n<p>Sursa: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=56278\">opennet.ro<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u043e\u0441\u043b\u0435 \u0432\u043e\u0441\u044c\u043c\u0438 \u043c\u0435\u0441\u044f\u0446\u0435\u0432 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0440\u0435\u043b\u0438\u0437 \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u0433\u0438\u043f\u0435\u0440\u0432\u0438\u0437\u043e\u0440\u0430 Xen 4.16. \u0412 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0435 \u043d\u043e\u0432\u043e\u0433\u043e \u0432\u044b\u043f\u0443\u0441\u043a\u0430 \u043f\u0440\u0438\u043d\u044f\u043b\u0438 \u0443\u0447\u0430\u0441\u0442\u0438\u0435 \u0442\u0430\u043a\u0438\u0435 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438, \u043a\u0430\u043a Amazon, Arm, Bitdefender, Citrix \u0438 EPAM Systems. \u0412\u044b\u043f\u0443\u0441\u043a \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0439 \u0434\u043b\u044f \u0432\u0435\u0442\u043a\u0438 Xen 4.16 \u043f\u0440\u043e\u0434\u043b\u0438\u0442\u0441\u044f \u0434\u043e 2 \u0438\u044e\u043d\u044f 2023 \u0433\u043e\u0434\u0430, \u0430 \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u044f \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 \u0434\u043e 2 \u0434\u0435\u043a\u0430\u0431\u0440\u044f 2024 \u0433\u043e\u0434\u0430. \u041a\u043b\u044e\u0447\u0435\u0432\u044b\u0435 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u0432 Xen 4.16: \u0412 TPM Manager, [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-102492","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2.1 - 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